Vibrational Properties of a Two-Dimensional Silica Kagome Lattice

被引：19

作者：

Bjorkman, Torbjorn ^{[1
,6
]}

Skakalova, Viera ^{[2
,7
]}

Kurasch, Simon ^{[3
]}

Kaiser, Ute ^{[3
]}

Meyer, Jannik C. ^{[2
]}

Smet, Jurgen H. ^{[4
]}

Krasheninnikov, Arkady V. ^{[5
,6
]}

机构：

[1] Abo Akad Univ, Phys Dept Nat Sci, FI-20500 Turku, Finland

[2] Univ Vienna, Fac Phys, Boltzmanngasse S, A-1190 Vienna, Austria

[3] Univ Ulm, Electron Microscopy Grp Mat Sci, D-89081 Ulm, Germany

[4] Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany

[5] Helmholtz Zentrum Dresden Rossendorf, Inst Ion Beam Phys & Mat Res, D-01328 Dresden, Germany

[6] Aalto Univ, Sch Sci, Dept Appl Phys, POB 11100, Aalto 00076, Finland

[7] STU Ctr Nanodiagnost, Vazovova 5, Bratislava 81243, Slovakia

来源：

ACS NANO | 2016年 / 10卷 / 12期

基金：

奥地利科学基金会; 芬兰科学院;

关键词：

2D materials; 2D silicon dioxide; kagome; anharmonicity; Raman spectroscopy; density functional theory; AUGMENTED-WAVE METHOD; ATOMIC-STRUCTURE; RAMAN-SPECTRA; GRAPHENE; METALS; FILMS; OXIDE; GLASS;

D O I：

10.1021/acsnano.6b05577

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Kagome lattices are structures possessing fascinating magnetic and vibrational properties, but in spite of a large body of theoretical work, experimental realizations and investigations of their dynamics are scarce. Using a combination of Raman spectroscopy and density functional theory calculations, we study the vibrational properties of two-dimensional silica (2D-SiO2), which has a kagome lattice structure. We identify the signatures of crystalline and amorphous 2D-SiO2 structures in Raman spectra and show that, at finite temperatures, the stability of 2D-SiO2 lattice is strongly influenced by phonon-phonon, interaction. Our results not only provide insights into the vibrational properties of 2D-SiO2 and kagome lattices in general but also suggest a quick nondestructive method to detect 2D-SiO2.

引用

页码：10929 / 10935

页数：7